From fec2ef4b687d67253426e011975c3defa7e52f29 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@redhat.com>
Date: Sat, 26 Nov 2011 16:01:04 -0800
Subject: [PATCH] omp-low: Assume anything aligned to BIGGEST_ALIGNMENT is
aligned.
* omp-low.c (expand_omp_atomic): Assume anything aligned to
BIGGEST_ALIGNMENT is aligned.
From-SVN: r181748
---
gcc/ChangeLog | 5 +++++
gcc/omp-low.c | 4 +++-
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7b81a0e1d9ed..5d304c890263 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2011-11-26 Richard Henderson <rth@redhat.com>
+
+ * omp-low.c (expand_omp_atomic): Assume anything aligned to
+ BIGGEST_ALIGNMENT is aligned.
+
2011-11-26 Richard Henderson <rth@redhat.com>
* config/m68k/m68k.md (UNSPECV_CAS_1, UNSPECV_CAS_2): New.
diff --git a/gcc/omp-low.c b/gcc/omp-low.c
index a4bfb8413fe9..4e1c2badae35 100644
--- a/gcc/omp-low.c
+++ b/gcc/omp-low.c
@@ -5501,7 +5501,9 @@ expand_omp_atomic (struct omp_region *region)
unsigned int align = TYPE_ALIGN_UNIT (type);
/* __sync builtins require strict data alignment. */
- if (exact_log2 (align) >= index)
+ /* ??? Assume BIGGEST_ALIGNMENT *is* aligned. */
+ if (exact_log2 (align) >= index
+ || align * BITS_PER_UNIT >= BIGGEST_ALIGNMENT)
{
/* Atomic load. */
if (loaded_val == stored_val
--
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